1. D. R. Easterling, T. C. Peterson, T. R. Karl, National Climatic Data Center, Asheville, NC 28801, USA.
2. B. Horton, D. E. Parker, C. K. Folland, Hadley Center, Meteorological Office, Bracknell, Berkshire, UK.
3. P. D. Jones, Climatic Research Unit, University of East Anglia, Norwich, UK.
4. M. J. Salinger, National Institute of Water and Atmospheric Research, Auckland, New Zealand.
5. V. Razuvayev, All-Russia Research Institute of Hydrometeorological Information, Obninsk, Russia.